Abstract
Storage tanks for petroleum products must comply with the requirements of technical, technological and environmental safety. The corrosion rate increases with prolonged storage of petroleum products in tanks. To prevent the destruction processes for reliable operation of tanks caused by metal corrosion some solutions are needed. Active formation of general sludge occurs in the storage of fuel oil, which contains corrosion-active substances, because of the incompatibility of fuels. The paper assesses the effect of total oil sludge in tanks on the corrosion process and on the reliability of tanks. Studies of the formation of a common sediment caused by incompatibility when mixing petroleum products are conducted. The paper proposes a solution which allows to reduce the formation of total oil sludge and to ensure reliable operation of reservoirs.
Highlights
Increasing the capacity of tank farms leads to an increase of accident risk level, as a consequence, the condition of the tanks should be technical supervision [1]
The principal difference of the new method is that to determine the compatibility of several types of petroleum products, first of all, it is necessary to perform tests to determine the total sediment with preliminary chemical aging (Total Sediments Accelerated - TSA) according to the method of GOST R 50837.6 for each component of the mixture
After determining the total sediment for each of the components, the fuel data should be thoroughly mixed in the required proportion and tests should be performed to determine the total sediment of the prepared mixture of petroleum products according to the method
Summary
Increasing the capacity of tank farms leads to an increase of accident risk level, as a consequence, the condition of the tanks should be technical supervision [1]. Because they contain sulfur and oxygen-containing compounds. Their number depends on many factors: type of fuel, methods of processing and the origin of oil. Oxygen-containing compounds contained in petroleum products affect their corrosivity and are naphthenic acids. They enter petroleum products with feedstock or are formed in petroleum products as a result of oxidation of commodity fuels during their storage and use. Studies indicate that often the occurrence of corrosion of internal surfaces of tanks occurs through an electrochemical mechanism due to the presence of a film of water on the inner surface of the tank, containing dissolved oxygen, mineral acids and salts. Water condensates that collect on metal surfaces are electrolyte solutions that promote electrochemical corrosion of metals in low acidity conditions
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